1. FIPTMV Medium Voltage Technology
SFG Top Unit

2. Main applications of the SFG
The SFG is a standard component in the Uniswitch MV switchgear worldwide
...up to 24kV
...up to 1250A
...up to 25kA

3. Uniswitch construction
1) Busbar compartment
2) The SFG switch disconnector
3) Cable compartment
4) Operating device, interlocking device and low voltage compartment

4. The SFG TopUnit 3-position indoor switch disconnector
Extremely durable operating device with optional tripping and motor operation
Epoxy resin enclosure with inspection windows

5. The SFG TopUnit at a glance
A compact SF6 -gas insulated indoor switch disconnector
Rated voltage kV
Rated current A
SFG TopUnit dimensions:
Length: 835 mm
Width: 375 and 500 mm
Weight: about 40 kg
3 positions: closed - open - earth

6. SFG Construction Gas compartment is sealed for life (EN 50187)
3 positions: closed - open - earth
2 windows for visual position inspection
Earthing switch with full making capacity
Magnetic blow type arc eliminator
Integrated capacitive divider for voltage indication

7. SFG TOP UNIT - features
Safety: Made to highest IEC standards, non corrosive leak proof enclosure, inspection windows, integrated voltage indicator, interlocking device, gas gauge, etc.
Economy: A life span of minimum 30 years, sealed for life, low maintenance costs
Reliability: Stringent testing of each unit, extremely durable and reliable actuator, worldwide use, etc.
Smart integration: Modular construction, compact size, easy installation, one switch - many applications

8. SFG TopUnit - Inspection windows
Provides the possibility to visually check the switch position

9. SFG TopUnit - Single spring mechanism
Compact, economical and durable construction
Minimum number of parts
Sealed for life
Stainless steel and aluminium
Three positions in one device
1 operation shaft as standard, 2 shafts as an option
Optional motor operating device
Patented position indicator
Easy to install

10. SFG TopUnit - Double spring mechanism
Fuse tripping function. Trip coil and emergency pushbutton as option
Compact, economical and durable construction
Three positions in one device
1 operation shaft as standard, 2 shafts as an option
Motor operating device as a build-on option
Patented position indicator
Easy to install

11. SFG TopUnit - Accessories
Operating mechanism:
1-spring or 2-spring
manual or motorized operation
1 or 2 operating shafts
Remote control
Key interlocking device
Gas pressure gauge
Fuse base and tripping
Mechanical position indication
Etc.

12. SFG TopUnit - Ratings Rated voltage (kV) 12 17,5 24
Rated lightning impulse withstand voltage, BIL
common value (kV)
across the isolating distance (kV)
Rated short-duration power-frequency withstand voltage
common value (kV)
across the isolating distance (kV)
Rated current (A)
Mainly active load breaking current
100 CO operations (A)
Making capacity (3-times) (kA) 62,
Short circuit current, 3s (kA)
Breaking capacity, IEC (A)
Max fuse (A)
Mechanical endurance of switch (c/o)
Mechanical endurance of earthing (c/o)
Rated filling pressure (gauge) (bar)